Revert "Temporarily stop running cros_vm_sanity_test on the CQ."

This reverts commit b7c18c08fc612dbee789d3d413ce8e3625fd6ea8.

Reason for revert: new CHROMEOS_LKGM picked up crash file fix

Original change's description:
> Temporarily stop running cros_vm_sanity_test on the CQ.
> 
> It's leaving around crash dumps that are filling up the disk and
> causing proceeding tests to fail. crbug.com/881638 fixed this, but that
> hasn't rolled into chromium yet. Disable the test until it does.
> 
> Bug: 876587
> Change-Id: Iacfdfb6f2f84a32027d4518a15949ab1e3d88677
> Reviewed-on: https://chromium-review.googlesource.com/1225934
> Reviewed-by: John Budorick <[email protected]>
> Commit-Queue: Ben Pastene <[email protected]>
> Cr-Commit-Position: refs/heads/master@{#591210}

[email protected],[email protected]

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: 876587
Change-Id: I330a72a6220cb25405df47733b97596dbea83b14
Reviewed-on: https://chromium-review.googlesource.com/1228301
Reviewed-by: Ben Pastene <[email protected]>
Commit-Queue: Ben Pastene <[email protected]>
Cr-Commit-Position: refs/heads/master@{#591829}
4 files changed